There is no lab here, no drawer of sample earrings and no dermatologist on staff. Pretending otherwise would be the easiest thing on this page to falsify, and it is the single most common lie in this category.
So here is what we did instead. We read what each seller states about the metal that goes through your ear, and about the back that holds it on, and we record it verbatim — including, and especially, when they state nothing. We cite the actual regulation that governs nickel in jewelry: REACH Annex XVII entry 27, which limits release to 0.2 micrograms per square centimeter per week for post assemblies in pierced ears, measured by EN 1811. We point out that the United States has no equivalent limit, which is exactly why “hypoallergenic” on a US listing is a marketing word.
And every price on this site comes from a live data layer that expires after 48 hours. Past that, the button reads “Check price on Amazon” rather than showing you a number we cannot stand behind.
The full rubric, published so you can recompute any score on the site.